The movement of substances across a cell membrane from an area of lower concentration to an area of higher concentration, which requires cellular energy & a carrier protein is called:

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased